The Iran nuclear deal was by no means an attempt to break from imperialism or whatever, that's stupid. That's like saying Kissinger broke from imperialism when he tried to make a peace deal with Vietnam. Cuba is not a major threat to the US, neither does the US care that much about any of its resources any more. Somewhat improving relations with them is the "easy" thing. Imperialism is not something you break every now and then from and then get back at it next day. Imperialism is systemic.

What I mean by full-scale war is an invasion, an occupation, and an attempt to install a U.S.-friendly government.

Well then that's everyone if we accept the last criterion lol

It’s not just a no-fly zone, or just cruise missile/drone strikes, or just special forces, or just an assassination, or just providing arms to domestic groups, or just CIA dealings with coup plotters.

"Just"???? Dude what kind of standards do you have? "Just" drone strikes? Do you know how many people are killed by drone strikes and missile strikes?

Like, even with your standards, this is wrong, like, did you forget who was in charge during the Yugoslavian wars? Look, I'm not gonna keep citing stuff, just check the wiki page and connect the dates to the people involved: https://en.m.wikipedia.org/wiki/Foreign_interventions_by_the_United_States